CN107354856B - A steel-concrete composite beam with a channel-shaped upper flange plate - Google Patents

Abstract

The invention relates to a steel-concrete composite beam with a grooved upper flange plate. The upper flange plate and the lower flange plate are connected by a web, and a stiffener is vertically arranged in the middle of the web, and the stiffener is connected to the lower flange. The flange plate is vertical, and a top plate is arranged on the top of the upper flange plate. The upper flange plate has a trapezoidal, arc, rectangular, and inverted triangular groove structure. The upper half of the upper flange plate extends into the top plate and is in the trapezoid, The arc-shaped, rectangular or inverted triangular grooves are poured with concrete that is integrally connected with the top plate, and the upper flange plate and the top plate are connected by shear connectors. The groove-shaped upper flange plate is used instead, which avoids the slip effect that is easy to occur between the flat plate upper flange plate and the concrete roof of the traditional I-shaped composite beam, and improves the overall working performance of the steel main beam and the concrete roof.

Description

A steel-concrete composite beam with a channel-shaped upper flange plate

technical field

The invention belongs to the technical field of steel-concrete composite structure bridges, and particularly relates to a steel-concrete composite beam with a groove-shaped upper flange plate.

Background technique

In recent years, steel-concrete composite structures have developed rapidly in my country. Engineering application practice has proved that composite structures make full use of the advantages of steel structures and concrete structures, and can obtain excellent structural performance with traditional construction methods and simple construction techniques. The advantages of "light-weight and large-span", prefabricated assembly, and rapid construction can meet the functional requirements of modern structures, have significant technical and social benefits, and are suitable for my country's modern infrastructure construction. It has become one of the important development directions of the structural system. one.

Metal foamed steel material has lightweight, high rigidity, durability, high specific surface area and special sound absorption, shock absorption, fire resistance, foam metal can be regarded as a composite material of metal and air. The closed-cell foam material has closed pores inside, which has the energy-absorbing effect like a honeycomb structure, and has excellent thermal insulation and fire resistance.

In the field of bridges, traditional I-shaped composite beams are widely used, but after summarizing practical engineering experience, it is found that there are the following problems: After the concrete roof and the I-shaped steel main beam are combined by shear connectors, slippage is easy to occur under the load. In addition, due to its excessive height-to-thickness ratio, it is easy to cause uneven local stress and damage to the stability of the bridge. Therefore, the traditional I-shaped composite beam needs more temporary support before the concrete roof is combined in the construction stage to ensure that the steel main The stability of the beam increases the difficulty of its construction.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the existing steel-concrete composite beams, the present invention provides a groove-shaped upper flange that can ensure the overall performance of the steel main beam and the concrete roof, improve the stiffness of the roof, and balance the force on the web. Steel-concrete composite beams of slabs.

The technical scheme adopted by the present invention to achieve the above purpose is as follows: the upper flange plate and the lower flange plate are connected by a web, and a stiffening rib is vertically arranged in the middle of the web, the stiffening rib is perpendicular to the lower flange plate, The top of the flange plate is provided with a top plate, the upper flange plate is a trapezoid, arc, rectangle, and inverted triangular groove structure, and the upper half of the upper flange plate extends into the top plate and is concave in the trapezoid, arc, rectangle or inverted triangle. Concrete integrated with the top plate is poured into the groove, and the upper flange plate and the top plate are connected by a shear connecting piece.

The above-mentioned upper flange plate may also have a hollow structure, the hollow tube is filled with foamed steel, and the ratio of the thickness of the bottom of the upper flange plate to the thickness of the foamed steel is 1:2-4.

The above-mentioned upper flange plate is a trapezoidal groove structure, which is composed of a bottom plate, an inclined web plate and an upper edge plate. The left and right ends of the bottom plate are respectively connected with inclined web plates to form a trapezoidal structure. There is an upper edge plate parallel to the bottom plate, the angle between the left inclined web and the bottom plate is 120° to 135°, the right inclined web and the left inclined web are symmetrical about the center line of the bottom plate, and the width of the bottom plate is the same as that of the bottom plate. The ratio of the length of the web is 1:1.5～2, the ratio of the width of the upper edge plate to the width of the bottom plate is 1:2～10, the height of the upper edge plate extending into the top plate is 1/3 of the total height of the upper flange plate ~1/2.

The above-mentioned upper flange plate is an arc-shaped groove structure, which is composed of an upper edge plate and an arc-shaped panel. The central angle is 150°～210°, the diameter is equal to the width of the lower flange plate, and the height of the upper edge plate extending into the top plate and into the top plate is 1/3～1/2 of the total height of the upper flange plate.

The above-mentioned upper flange plate is a rectangular groove structure, which is composed of a bottom plate, a straight web plate and an upper edge plate. The left and right ends of the bottom plate are respectively connected with straight web plates to form a rectangular structure, which is arranged at the top of the straight web plate. There is an upper edge plate parallel to the bottom plate, the right straight web plate and the left straight web plate are symmetrical about the center line of the bottom plate, the ratio of the width of the bottom plate to the length of the straight web plate is 1:0.5~1, and the width of the upper edge plate is the same as the bottom plate. The ratio of the width of the upper flange plate is 1:2～10, and the height of the upper edge plate extending into the top plate is 1/3～1/2 of the total height of the upper flange plate.

The above-mentioned upper flange plate is an inverted triangular groove structure, which is composed of an upper edge plate and an upper flange inclined web, and the left and right ends of the upper side of the web are respectively connected with inclined webs to form an inverted triangular structure. The top of the inclined web is provided with an upper edge plate parallel to the lower flange plate, the angle between the left inclined web and the web is 120°~150°, the right inclined web and the left inclined web are about 120° to 150°. The center line of the web is symmetrical, the ratio of the width of the lower flange plate to the length of the inclined web is 1:0.8～1.5, the ratio of the width of the upper edge plate to the width of the lower flange plate is 1:2～10, the upper edge plate The height extending into the top plate is 1/3 to 1/2 of the total height of the upper flange plate.

The above-mentioned shear connectors are equally spaced or symmetrically distributed on the upper flange plate.

The steel-concrete composite beam of the groove-shaped upper flange plate provided by the present invention is formed by processing the upper flange plate of the bridge into a trapezoidal groove, an arc groove, a rectangular groove, an inverted triangular groove or a trapezoidal tubular inner filling. The structure of foamed steel grooves, arc-shaped tubular-shaped inner-filled foamed steel grooves, rectangular tubular-shaped inner-filled foamed steel grooves, and inverted triangular-shaped tubular-shaped inner-filled foamed steel grooves, and the inner tubular upper flange is filled with foaming Steel, foamed steel and the upper flange steel plate form an integral structure, and the concrete is poured into the groove to form an integrated structure with the roof. For the overall working performance of the roof, by replacing the flat upper flange plate of the traditional I-shaped composite beam with the grooved upper flange plate, the sliding between the flat upper flange plate and the concrete roof of the traditional I-shaped composite beam is avoided. It can improve the overall working performance of the steel main beam and the concrete roof. The upper flange plate extending into the roof improves the rigidity of the concrete roof. The tubular upper flange is filled with foamed steel to improve the performance of the upper flange plate. In addition, the design of the present invention reduces the height of the web and avoids the problem that the height-to-thickness ratio of the web is too large to affect the stability. It has the advantages of high torsional stiffness, good overall performance, and resistance to web buckling deformation. It can make full use of the material properties of steel and concrete to improve the bearing capacity of composite beams. Compared with traditional I-shaped composite beams, it has broad application prospects.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1. FIG.

FIG. 2 is a schematic structural diagram of the upper flange plate 2 in FIG. 1 .

FIG. 3 is a schematic structural diagram of Embodiment 4. FIG.

FIG. 4 is a schematic structural diagram of the upper flange plate 2 in FIG. 3 .

FIG. 5 is a schematic structural diagram of Embodiment 5. FIG.

FIG. 6 is a schematic structural diagram of the upper flange plate 2 in FIG. 5 .

FIG. 7 is a schematic structural diagram of Embodiment 8. FIG.

FIG. 8 is a schematic structural diagram of the upper flange plate 2 in FIG. 7 .

FIG. 9 is a schematic structural diagram of Embodiment 9. FIG.

FIG. 10 is a schematic structural diagram of the upper flange plate 2 in FIG. 9 .

FIG. 11 is a schematic structural diagram of Embodiment 12. FIG.

FIG. 12 is a schematic structural diagram of the upper flange plate 2 in FIG. 11 .

FIG. 13 is a schematic structural diagram of Embodiment 13. FIG.

FIG. 14 is a schematic structural diagram of the upper flange plate 2 in FIG. 13 .

FIG. 15 is a schematic structural diagram of Embodiment 16. FIG.

FIG. 16 is a schematic structural diagram of the upper flange plate 2 in FIG. 15 .

Detailed ways

The technical solutions of the present invention will be further described with reference to the accompanying drawings and embodiments, but the present invention is not limited to the following implementations.

Example 1

Referring to FIG. 1 , the steel-concrete composite beam of the channel-shaped upper flange plate of this embodiment is composed of a top plate 1 , an upper flange plate 2 , a stiffener 3 , a web plate 4 , a lower flange plate 5 and a shear connector 6 Combination composition.

In this embodiment, the lower flange plate 5 and the web plate 4 are connected in a T-shape, that is, the lower end of the web plate 4 is welded with the lower flange plate 5, and a stiffening rib 3 is welded in the middle of the web plate 4. The stiffening ribs 3 are respectively connected to the lower flange plate 5. The flange plate 5 and the web plate 4 are vertical, and the upper flange plate 2 is welded and connected at the opposite end of the web plate 4 and the lower flange plate 5. The upper flange plate 2 in this embodiment is a trapezoidal groove structure, see FIG. 2, It is composed of bottom plate 2-1, inclined web plate 2-2 and upper edge plate 2-3. The bottom plate is parallel to the lower flange plate 5 and welded to the upper end of the web plate 4. Its length is 4300mm, its width is 150mm, and its thickness is 150mm. It is 12mm, and the left and right ends of the bottom plate are respectively welded with inclined webs 2-2. The inclined webs 2-2 in this embodiment are divided into left inclined webs and right inclined webs, that is, the left inclined webs are welded to the bottom plate. In order to ensure the overall structural rigidity, the inclination angle of the left inclined web is 130°, that is, the angle between the left inclined web and the bottom plate is 130°, and the left inclined web is 130°. The length of the plate is 270mm, and the ratio to the width of the bottom plate is 1.8:1. The right inclined web has the same specification and structure as the left inclined web, and is symmetrical about the center line of the bottom plate. An upper edge plate 2-3 is welded on the top of the left inclined web plate and the right inclined web plate respectively. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 30mm, and the thickness is 8mm, namely the upper edge plate The ratio of the width of 2-3 to the width of the base plate is 1:5. A top plate 1 is provided on the top of the upper flange plate 2 in this embodiment. In order to strengthen the structural rigidity of the top plate 1, the upper end of the upper flange plate 2 extends into the top plate 1. The top plate 1 in this embodiment is made of concrete. In order to connect the upper flange plate 2 and the top plate 1 into an integrated structure and at the same time strengthen the stability of the upper flange plate 2, concrete material is poured into the trapezoidal groove formed by the inclined web plate 2-2 of the upper flange plate 2 and the bottom plate, It is connected with the top plate 1 as a whole, the inclined web plate 2-2 and the upper edge plate 2-3 of the upper flange plate 2 extend into the top plate 1, and the height of the upper edge plate 2-3 extending into the top plate 1 is the height of the upper flange plate. 2 2/5 of the total height. In order to strengthen the connection strength between the upper flange plate 2 and the top plate 1, four sets of shear connectors 6 are installed on the inner surface of the upper flange plate 2, that is, the shear connectors 6 in this embodiment are fastening bolts, two of which are The two groups are symmetrically arranged at the center of the vertical height of the inclined web 2-2, and the direction is perpendicular to the inclined web 2-2, and the other two groups are arranged at the middle two quarter points in the width direction of the bottom plate, and the direction is perpendicular to the bottom plate. A set of tightening bolts are symmetrically installed on the part of the outer surface of the upper flange plate 2 extending into the top plate 1, that is, the part of the outer surface of the left sloping web plate and the right sloping web plate extending into the top plate 1. The directions of the tightening bolts are respectively It is perpendicular to the left inclined web and the right inclined web.

Example 2

The inclined angle of the left inclined web of the inclined web 2-2 in this embodiment is 120°, that is, the angle between the left inclined web and the bottom plate is 120°, the length of the left inclined web is 225mm, and the angle between the left inclined web and the bottom plate is 120°. The ratio of the width is 1.5:1, and the right sloping web has the same specification and structure as the left sloping web, and is symmetrical about the center line of the bottom plate. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 20mm, and the thickness is 8mm, that is, the ratio of the width of the upper edge plate 2-3 to the width of the bottom plate is 1:7.5, and the upper edge plate 2-3 extends The height into the top plate 1 is 1/2 of the total height of the upper flange plate 2 .

Other components and their connection relationships are the same as those in Embodiment 1.

Example 3

The inclined angle of the left inclined web of the inclined web 2-2 in this embodiment is 135°, that is, the angle between the left inclined web and the bottom plate is 135°, the length of the left inclined web is 300mm, and the angle between the left inclined web and the bottom plate is 135°. The ratio of width is 2:1, and the right sloping web has the same specification and structure as the left sloping web, and is symmetrical about the center line of the bottom plate. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 15mm, and the thickness is 8mm, that is, the ratio of the width of the upper edge plate 2-3 to the width of the bottom plate is 1:10, and the upper edge plate 2-3 extends The height into the top plate 1 is 1/3 of the total height of the upper flange plate 2 .

Other components and their connection relationships are the same as those in Embodiment 1.

Example 4

Referring to FIG. 3 , the steel-concrete composite beam of the channel-shaped upper flange plate of this embodiment is composed of a top plate 1, an upper flange plate 2, a stiffener 3, a web plate 4, a lower flange plate 5, and a shear connector 6 It is composed of foamed steel 7.

The upper flange plate 2 of this embodiment is filled with foamed steel in the hollow tube of the hollow trapezoidal tubular groove structure, see FIG. 3 is composed of foamed steel 7. The bottom plate 2-1 is parallel to the lower flange plate 5 and welded to the upper end of the web plate 4. The outer wall has a length of 4300mm, a width of 150mm, a thickness of 12mm, and an inner wall length of 4300mm, a width of 96mm and a thickness of 12mm. The left and right ends of the bottom plate 2-1 are respectively welded with inclined webs 2-2. The inclined webs 2-2 in this embodiment are divided into left inclined webs and right inclined webs, and right inclined webs and left inclined webs. The plate size and structure are the same, and are symmetrical about the center line of the base plate. An upper edge plate 2-3 is welded on the top of the left inclined web plate and the right inclined web plate respectively. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 75mm, and the thickness is 8mm, namely the upper edge plate The ratio of the width of the 2-3 to the width of the base plate is 1:2. The thickness of the inner-filled foamed steel 7 in the upper flange plate 2 of this embodiment is 36 mm, that is, the ratio of the thickness of the foamed steel 7 to the bottom plate 2-1 is 1:3.

The connection relationship of other components and components is the same as that of Embodiment 1 or 2 or 3

Example 5

5 and 6 , the upper flange plate 2 of this embodiment is an arc-shaped groove structure, which is composed of an arc-shaped panel 2-4 and an upper edge plate 2-3, and the bottom of the arc-shaped panel 2-4 is welded on The upper end of the web 4, its central angle is 180°, the diameter is equal to the width of the lower flange plate 5, the top ends of the left and right sides of the arc-shaped panel 2-4 extend into the top plate 1 and are respectively welded with the upper edge plate 2- 3. The upper edge plate 2-3 is parallel to the lower flange plate 5, and its height extending to the top plate 1 is 1/2 of the total height of the upper flange plate 2. Four groups of shear connectors 6 are installed on the inner surface of the arc-shaped panel 2-4, and the arc length of the arc-shaped panel 2-4 is equally spaced into five equal parts, which are respectively installed at the middle four equal points, and Symmetrical distribution, the shear connector 6 in this embodiment is a fastening bolt, the direction of the fastening bolt is perpendicular to the tangent of the arc at the bisector point, and extends to the part in the top plate 1 on the left and right sides of the arc panel 2-4 A set of shear connectors 6 are also installed on the outer surface, the direction of which is perpendicular to the tangent of the arc at this point, and the position is installed at 1/2 of the arc length of the arc segment extending from the arc panel 2-4 to the top plate 1 .

Other components and their connection relationships are the same as those in Embodiment 1.

Example 6

The upper flange plate 2 of this embodiment is an arc-shaped groove structure, which is composed of an arc-shaped panel 2-4 and an upper edge plate 2-3. The bottom of the arc-shaped panel 2-4 is welded to the upper end of the web 4, and its The central angle is 150°, the diameter is equal to the width of the lower flange plate 5, the top ends of the left and right sides of the arc-shaped panel 2-4 extend into the top plate 1 and are respectively welded with the upper edge plate 2-3, the upper edge plate 2- 3 is parallel to the lower flange plate 5, and its height extending to the top plate 1 is 1/3 of the total height of the upper flange plate 2.

The other components and their connection relationships are the same as those in the fifth embodiment.

Example 7

The upper flange plate 2 of this embodiment is an arc-shaped groove structure, which is composed of an arc-shaped panel 2-4 and an upper edge plate 2-3. The bottom of the arc-shaped panel 2-4 is welded to the upper end of the web 4, and its The central angle is 210°, the diameter is equal to the width of the lower flange plate 5, the top ends of the left and right sides of the arc-shaped panel 2-4 extend into the top plate 1 and are respectively welded with the upper edge plate 2-3, the upper edge plate 2- 3 is parallel to the lower flange plate 5, and its height extending to the top plate 1 is 2/5 of the total height of the upper flange plate 2.

The other components and their connection relationships are the same as those in the fifth embodiment.

Example 8

7 and 8, the upper flange plate 2 of this embodiment is a hollow arc-shaped tubular groove structure, and the hollow tube is filled with foamed steel 7, which is an arc-shaped panel 2-4, an upper edge plate 2-3 It is composed of foamed steel 7, the bottom of the arc-shaped panel 2-4 is welded to the upper end of the web 4, its central angle is 180°, the diameter is equal to the width of the lower flange plate 5, and the tops of the left and right sides of the arc-shaped panel extend to The top plate 1 is respectively welded with an upper edge plate 2-3, the upper edge plate 2-3 is parallel to the lower flange plate 5, and the height extending to the top plate 1 is 1/2 of the total height of the upper flange plate 2. The hollow cavity of the arc-shaped panel 2-4 is filled with foamed steel 7, and the ratio of the thickness of the foamed steel 7 to the arc-shaped panel 2-4 is 3:1. Four sets of shear connectors 6 are installed on the inner wall of the arc-shaped panel 2-4, and the arc length of the arc-shaped panel 2-4 is equally divided into five equal intervals, which are respectively installed at the middle four equal points, and are symmetrical Distribution, the shear connector 6 of this embodiment is a fastening bolt, the direction of the fastening bolt is perpendicular to the tangent of the circular arc at the bisector point, and extends to the left and right sides of the outer wall of the arc-shaped panel 2-4 to the inside of the top plate 1. A set of shear connectors 6 are also installed on part of the outer surface, the direction of which is perpendicular to the tangent of the arc at this point, and the position is installed on the arc panel 2-4 extending to 1/2 of the arc length of the arc segment in the top plate 1 place.

Other components and their connection relationships are the same as those in Embodiment 5 or 6 or 7.

Example 9

9 and 10, the upper flange plate 2 of this embodiment is a rectangular groove structure, which is composed of a bottom plate 2-1, an upper edge plate 2-3 and a straight web 2-5. The bottom plate 2-1 and the lower The flange plate 5 is parallel and welded to the upper end of the web plate 4. Its length is 4300mm, the width is 200mm, and the thickness is 12mm. The left and right ends of the bottom plate are respectively welded with straight webs 2-5. Plates 2-5 are divided into left straight web and right straight web, that is, the left straight web is welded to the left end of the bottom plate, and the right straight web is welded to the right end of the bottom plate. The length of the left straight web is 100mm, which is the same as the width of the bottom plate. The ratio is 1:2. The right straight web has the same specification and structure as the left straight web, and is symmetrical about the center line of the bottom plate. An upper edge plate 2-3 is welded on the top of the left straight web plate and the right straight web plate respectively. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 20mm, and the thickness is 8mm, namely the upper edge plate The ratio of the width of 2-3 to the width of the base plate is 1:10. A top plate 1 is provided on the top of the upper flange plate 2 in this embodiment. In order to strengthen the structural rigidity of the top plate 1, the upper end of the upper flange plate 2 extends into the top plate 1. The top plate 1 in this embodiment is made of concrete. In order to connect the upper flange plate 2 and the top plate 1 into an integrated structure and at the same time strengthen the stability of the upper flange plate 2, concrete material is poured into the rectangular groove formed by the straight webs 2-5 of the upper flange plate 2 and the bottom plate, Connected with the top plate 1 as a whole, the straight web 2-5 of the upper flange plate 2 and the upper edge plate 2-3 extend into the top plate 1, and the height of the upper edge plate 2-3 extending into the top plate 1 is the height of the upper flange plate 2 2/5 of the total height. A top plate 1 is arranged on the top of the upper flange plate 2 in this embodiment. In order to strengthen the structural rigidity of the top plate 1 and the connection strength between the upper flange plate 2 and the top plate 1, four sets of four groups are installed on the inner surface of the upper flange plate 2. The shear connector 6, that is, the shear connector 6 in this embodiment is a fastening bolt, of which two groups are symmetrically arranged at the center of the vertical height of the straight web 2-5, and the direction is perpendicular to the straight web 2-5, and the other two The groups are arranged at the middle two quarter points in the width direction of the base plate, and the direction is perpendicular to the base plate. A set of tightening bolts are symmetrically installed on the part of the outer surface of the upper flange plate 2 extending into the top plate 1, that is, the left straight web plate and the part of the outer surface of the right straight web plate extending into the top plate 1. The directions of the tightening bolts are respectively It is perpendicular to the left straight web and the right straight web.

Other components and their connection relationships are the same as those in Embodiment 1.

Example 10

The length of the left straight web 2-5 in this embodiment is 180mm, and the ratio to the width of the bottom plate is 1:1. The right straight web and the left straight web have the same specification and structure, and are symmetrical about the center line of the bottom plate. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 36mm, and the thickness is 8mm, that is, the ratio of the width of the upper edge plate 2-3 to the width of the bottom plate is 1:5, and the upper edge plate 2-3 extends The height into the top plate 1 is 1/2 of the total height of the upper flange plate 2 .

The other components and their connection relationships are the same as those in the ninth embodiment.

Example 11

The length of the left straight web 2-5 in this embodiment is 200mm, and the ratio to the width of the bottom plate is 0.8:1. The right straight web has the same specification and structure as the left straight web, and is symmetrical about the center line of the bottom plate. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 33mm, and the thickness is 8mm, that is, the ratio of the width of the upper edge plate 2-3 to the width of the bottom plate is 1:7.5, and the upper edge plate 2-3 extends The height into the top plate 1 is 1/3 of the total height of the upper flange plate 2 .

The other components and their connection relationships are the same as those in the ninth embodiment.

Example 12

11 and 12, the upper flange plate 2 of this embodiment is a hollow rectangular tubular structure, and the hollow tube is filled with foamed steel 7, which is composed of a bottom plate 2-1, an upper edge plate 2-3, a straight web plate 2-5 and foamed steel 7, the outer wall of the bottom plate 2-1 is parallel to the lower flange plate 5, welded to the upper end of the web plate 4, its length is 4300mm, the width is 200mm, the thickness is 12mm, the bottom plate 2-1 is The length of the inner wall is 4300mm, the width is 104mm, and the thickness is 12mm. The left and right ends of the bottom plate 2-1 are respectively welded with straight webs 2-5. The straight webs 2-5 in this embodiment are divided into left straight webs and For the right straight web, the length of the left straight web is 100mm, and the ratio to the width of the bottom plate is 1:2. The right straight web has the same specification and structure as the left straight web, and is symmetrical about the center line of the bottom plate. The left and right ends of the bottom plate 2-1 are respectively welded with straight webs 2-5. The length of the inner wall of the left straight web 2-5 is 52mm, and the ratio to the width of the inner wall of the bottom plate 2-1 is 1:2 , the right straight web 2-5 has the same specifications and structure as the left straight web 2-5, and is symmetrical about the center line of the bottom plate. An upper edge plate 2-3 is welded to the top of the left and right straight web plates 2-5 respectively. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 80mm, and the thickness is 8mm, namely the upper edge plate The ratio of the width of 2-3 to the width of the outer wall of the bottom plate 2-1 is 1:2.5. The hollow cavity of the upper flange plate 2 is filled with foamed steel 7, and the ratio of the thickness of the foamed steel 7 to the bottom plate 2-1 is 4:1, that is, the thickness of the foamed steel 7 is 48 mm.

The other components and their connection relationships are the same as those in Embodiment 9 or 10 or 11.

Example 13

13 and 14, the upper flange plate 2 of this embodiment is an inverted triangular groove structure, which is composed of an upper flange inclined web 2-6 and an upper flange plate 2-3. The upper flange inclined web The bottom of 2-6 is welded on the upper end of the web 4. The upper flange inclined web 2-6 in this embodiment is divided into the upper flange left inclined web and the upper flange right inclined web, that is, the upper flange left inclined The web is welded on the left side of the upper end of the web, and the right inclined web of the upper flange is welded on the right side of the upper end of the web. To ensure the overall structural rigidity, the inclination angle of the left inclined web of the upper flange is 120°, that is The angle between the left oblique web of the flange and the bottom plate is 120°, the length of the left oblique web of the upper flange is 200mm, the ratio of the width to the lower flange plate 5 is 0.8:1, the thickness is 12mm, and the upper flange The right sloping web has the same specification and structure as the left sloping web of the upper flange, and is symmetrical about the center line of the web 4 . An upper edge plate 2-3 is welded on the tops of the left sloping web of the upper flange and the right sloping web of the upper flange respectively. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 50mm, and the thickness is 8mm, that is, the ratio of the width of the upper edge plate 2-3 to the width of the lower flange plate is 1:5. A top plate 1 is provided on the top of the upper flange plate 2 in this embodiment. In order to strengthen the structural rigidity of the top plate 1, the upper end of the upper flange plate 2 extends into the top plate 1. The top plate 1 in this embodiment is made of concrete. In order to connect the upper flange plate 2 and the top plate 1 into an integrated structure and at the same time strengthen the stability of the upper flange plate 2, concrete material is poured into the inverted triangular groove formed by the left and right inclined webs of the upper flange plate 2, and the The top plate 1 is connected as a whole. On the inclined web of the upper flange plate 2, the flange inclined web plate 2-6 and the upper edge plate 2-3 extend into the top plate 1, and the upper edge plate 2-3 extends to the height of the top plate 1. It is 2/5 of the total height of the upper flange plate 2. In order to strengthen the connection strength between the upper flange plate 2 and the top plate 1, four sets of shear connectors 6 are installed on the inner surface of the upper flange plate 2, that is, the shear connectors 6 in this embodiment are fastening bolts, of which four The groups are symmetrically arranged at the two third points of the upper flange sloping web 2-6, and the direction is perpendicular to the upper flange sloping web 2-6. A set of tightening bolts are symmetrically installed on the part of the outer surface of the upper flange plate 2 extending into the top plate 1, that is, the part of the outer surface of the left sloping web plate and the right sloping web plate extending into the top plate 1. The directions of the tightening bolts are respectively It is perpendicular to the left inclined web of the upper flange and the right inclined web of the upper flange.

Other components and their connection relationships are the same as those in Embodiment 1.

Example 14

The inclination angle of the upper flange left inclined web of the upper flange inclined webs 2-6 in this embodiment is 135°, that is, the angle between the upper flange left inclined web and the web 4 is 135°, and the upper flange left inclined web is 135°. The length of the left oblique web of the flange is 180mm, and the ratio to the width of the lower flange plate 5 is 1.2:1. Center line symmetry. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 20mm, and the thickness is 8mm, that is, the ratio of the width of the upper edge plate 2-3 to the width of the bottom plate is 1:7.5, and the upper edge plate 2-3 extends The height into the top plate 1 is 1/2 of the total height of the upper flange plate 2 .

The other components and their connection relationships are the same as those in the thirteenth embodiment.

Example 15

The inclination angle of the upper flange sloping webs 2-6 in this embodiment is 150°, that is, the angle between the upper flange left sloping web and the web 4 is 150°, and the length of the upper flange left sloping web is 150°. It is 225mm, and the ratio to the width of the lower flange plate 5 is 1.5:1. The right oblique web of the upper flange and the left oblique web of the upper flange have the same specification and structure, and are symmetrical about the center line of the bottom plate. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 15mm, and the thickness is 8mm, that is, the ratio of the width of the upper edge plate 2-3 to the width of the bottom plate is 1:10, and the upper edge plate 2-3 extends The height into the top plate 1 is 1/3 of the total height of the upper flange plate 2 .

The other components and their connection relationships are the same as those in the thirteenth embodiment.

Example 16

15 and 16, the upper flange plate 2 of this embodiment is a hollow inverted triangular tube structure, and the hollow tube is filled with foamed steel 7, which is composed of the upper flange inclined web plates 2-6, the upper edge plate 2 -3 and foam steel 7, the bottom of the upper flange inclined web 2-6 is welded to the upper end of the web 4, the inclination angle of the upper flange left inclined web is 120°, that is, the upper flange left inclined web The angle between it and the web is 120°, the length of the outer wall of the upper flange left inclined web is 200mm, the ratio to the width of the lower flange plate 5 is 0.8:1, the thickness is 12mm, the upper flange) inclined web The length of the inner wall of 2-6 is 120mm and the thickness is 12mm. The right oblique web of the upper flange and the left oblique web of the upper flange have the same specification and structure, and are symmetrical about the center line of the web 4. An upper edge plate 2-3 is welded on the top of the left and right inclined web plates of the upper flange respectively. The length of the upper edge plate 2-3 in this embodiment is 4300mm, the width is 100mm, and the thickness is 8mm, namely the upper edge plate The ratio of the width of the 2-3 to the width of the lower flange plate is 1:2.5. The hollow tube of the upper flange plate 2 of the inverted triangular tubular structure is filled with foamed steel 7, and the ratio of the thickness of the foamed steel 7 to the upper flange inclined web 2-6 is 3:1, that is, the thickness of the foamed steel is 36mm .

The other components and their connection relationships are the same as those in Embodiment 13 or 14 or 15.

Example 17

The shear connector 6 in the above-mentioned Embodiments 1 to 16 can also be replaced by a stiffening plate or an anchor rod.

Other components and their connection relationships are the same as the corresponding embodiments.

The present invention is not limited to the above-mentioned embodiment, wherein the shear-resistant connecting piece 6 can also be replaced with other common fasteners, and the specific number and distribution position thereof can also be adjusted according to the actual use situation.

Claims (2)

1. A steel-concrete composite beam with a grooved upper flange plate, the upper flange plate (2) and the lower flange plate (5) are connected by a web (4), and the middle of the web (4) is vertical A stiffening rib (3) is provided, the stiffening rib (3) is perpendicular to the lower flange plate (5), and a top plate (1) is arranged on the top of the upper flange plate (2), characterized in that: the upper flange plate (2) It is a trapezoidal, arc, rectangular, inverted triangular groove structure; the upper half of the upper flange plate (2) extends into the top plate (1) and is in the trapezoidal, arc, rectangular or inverted triangular groove. Concrete integrated with the top plate (1) is poured inside, and the upper flange plate (2) and the top plate (1) are connected by a shear connecting piece (6); the upper flange plate (2) is a hollow structure , the upper flange plate (2) is filled with foamed steel (7), and the ratio of the thickness of the bottom plate of the upper flange plate (2) to the thickness of the foamed steel (7) is 1:2 to 4. 2. The steel-concrete composite beam of the channel-shaped upper flange plate according to claim 1, characterized in that: the height of the upper flange plate (2) extending into the top plate (1) is the height of the upper flange plate (2) 1/3 to 1/2 of the total height.

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